1 tuber 229326-1 £3.95

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3 tubers 229326-3 £9.95

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1 x 3 litre pot 229326-3L £10.50

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More Details

Sultry, sophisticated and beautiful, with petals cut from silk velvet. In a class of its own.

This can be gift wrapped in our exclusive hessian sack, with ribbon and a Sarah Raven gift card. You will be able to add this to your basket once you begin the checkout process. To add a gift message to your order, simply fill out the details at the delivery stage of the checkout.

Please note: only items which are showing ‘in stock’ can be gift wrapped.

Genus Dahlia
Group/Species Miscellaneous Group

Orchid-flowered and Peony-flowered types are classified as Miscellaneous. Also includes Double Orchid-flowered, Bishop, Mini Bishop and Star dahlias. Click here for more information about dahlia groups.

Variety Verrone's Obsidian
Type Tender Perennial
Common Name Dahlia
Border Position Cutting Garden
Bulb Size I
Soil Type Broad Tolerance
Scent Unscented
Site Full Sun
Moisture Moist but Well-drained
Height 90cm (36in)
Spacing 75cm (30in)
Sowing, Seeds, Planting Plant just under the soil surface after the last frosts. Alternativley pot them up undercover March or early April in a generous pot (at least 2 litre) filled with multi-purpose potting compost. Place them in a light, frost-free place and keep the compost moist. Pinch out their growing tips when they have reached about 8" tall. They will have formed bushy plants by the time the frosts have ended and will be in flower by the beginning of July. If you don’t have anywhere to grow the potted tubers, you can put them straight into the ground when the frosts are nearly over, mulching them or protecting with a cloche or protective horticultural fleece if the foliage appears before the frosts are over, but this will delay flowering.
Care Tips Support with a stout stick, tie in every couple of weeks. In the south you can mulch deeply and overwinter them in the ground, alternatively, lift and overwinter your dahlias frost free undercover.
Flowering July - November
Harvesting Flower production 5 months
Cooking Notes All dahlia flowers are edible. I use the petals scattered over salad and to decorate a range of puddings.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice & Videos
Understanding dahlia groups

A list of the different dahlia groups, along with some classification info and an example of a variety in each group.

History of the dahlia

First discovered by Aztec Indians and used for food and medicine, this tuber has an interesting history of cultivation.

How to plant and grow dahlia tubers

Discover how to grow strong, healthy dahlias – how to plant, look after and overwinter them, and what to do with your bulbs when they arrive.

How to overwinter dahlia tubers

Sarah discusses the best options for overwintering dahlias – lifting or mulching.

Sublime dark dahlia flower arrangement

Sarah shows you how to make a gorgeous large arrangement of dahlias.

Planting narcissi bulbs with dahlias

Have a beautiful display of flowers in your garden from March to the first frosts with this simple planting technique.

New favourite dahlia arrangement

Sarah shows you how to make a quick arrangement of colourful dahlias.

Growing dahlias in pots

Sarah shows you her favourite dahlia varieties for pots, and gives you some tips on how to grow them successfully.

How to take dahlia cuttings

Watch and learn how to take dahlia cuttings – turn 1 tuber into 10.


Bulb Delivery - When in stock, please allow 2-3 days for despatch.

Plant Delivery - When in stock, please allow up to 3-4 weeks for despatch. For fruit & veg bare roots/crowns, please allow up to 2 weeks for despatch.

Click here to find out more information about our delivery rates and times.

Dahlia 'Verrone's Obsidian' reviews

* * * * * Average based on 12 reviews

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Reviewed 4th November 2019 by Debz

Such a special flower. The slugs did get to mine at the start but recovered and grew to a small bush that gave me bloom after bloom. The bees love it.

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Reviewed 29th September 2019 by Amanda

first tuber was sickly and Sarah Raven replaced them. After some mishaps with plagues of slugs and snails they have regrown and produced statuesque plantswhich are about to flower. Fingers crossed I see them before winter frosts.

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Reviewed 16th August 2019 by Suzanne

This tuber has made a fairly good plant but now flowered yet.

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Reviewed 7th August 2019 by Karen

I bought Dahlia for my sister who lives in London. It was a thank-you for being there when I was diagnosed with Breast cancer. On my last visit the Plant was thriving and very healthy but no flowers blooming from the buds yet. That was the beginning of July.

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Reviewed 2nd August 2019 by Teresa

I was expecting Verrone's Obsidian as I already had one from last year which I loved . I coudn't understand why it didnt grow very tall on inpection it was not Obsidian at all , it was a 12 inch high single plum flower. I am very dissappointed.

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Reviewed 1st August 2019 by Philippa

Exactly what I wanted. Grew well and looks very pretty.

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Reviewed 31st July 2019 by Gill

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Reviewed 31st July 2019 by Suzanne

This tuber has made a fairly good plant but now flowered yet.

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Reviewed 31st July 2019 by Rowena

Top quality, blooming now & just gorgeous a stunning variety that I couldn't buy eksewhere

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Reviewed 31st July 2019 by Carolyn

Excellent website, very good and well thought out packaging, very helpful instructions other than healthy seedlings and bulbs, all despatched with good timing . Look forward to trying vegetable and flower seeds.

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Reviewed 31st July 2019 by Catherine

I was late starting this and two others but they’re coming on now, despite the attentions of the local slug population! The tuber was in good condition when it arrived, well packed, and was quick to start into growth as indeed all three varieties were, unfortunately I mixed up the labels so I’m now waiting to see which one’s which. But the slugs keep finding them even tho I keep moving them so no flowers yet!

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Reviewed 31st July 2019 by Kate

They are not flowering yet - I thought the plants were a little late to be planting - most dahlias I see in other people’s gardens are flowering profusely - I hope they will still delight us